A decking and fencing installer constructs outdoor timber and composite structures - from ground-level deck terraces to raised platforms, close-board and panel fencing, pergolas, screens and gates. Good decking installation requires correct structural support, appropriate timber treatment, adequate drainage gaps between boards and compliant balustrade heights where decking is raised. Permitted development rules apply to decking height and garden coverage - always check before building raised platforms.
What they do
- Design and construct softwood, hardwood and composite deck structures
- Install post foundations - concrete posts or adjustable deck feet on concrete
- Build joist and bearer framework to specification
- Lay deck boards with correct drainage gaps and fixings (hidden clip or screw)
- Install balustrades, handrails and post caps to compliant heights
- Erect close-board, feather-edge and panel fencing on concrete or timber posts
- Build pergolas, gazebos and garden screens
- Hang gates - domestic, field and security gates
- Install trellis, privacy screens and slatted fencing
- Treat and finish timber with preservative stain or oil
When you need one
A specialist decking and fencing installer delivers structurally sound, well-finished outdoor structures that last - poor installation leads to rot, movement and premature failure.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Softwood decking (supply+build, per sq m) | £100 - £180 |
| Composite decking (supply+build, per sq m) | £150 - £280 |
| Close-board fence (supply+fit, per metre) | £60 - £120 |
| Pergola (supply+build) | £1,500 - £5,000 |
| Hardwood decking (supply+build, per sq m) | £180 - £350 |
| Gate installation | £400 - £900 |
Composite decking board prices vary from budget to premium - a higher quality board has better UV resistance, scratch resistance and longer warranty (25-30 years for premium vs 10-15 years for budget). Always ask for the manufacturer warranty documentation.
Qualifications to look for
A relevant vocational qualification indicates formal training in timber construction techniques and safe working practice.
Required for working on commercial and managed construction sites. Domestic installers should still hold current CSCS cards as evidence of minimum health and safety competence.
How to find a reputable decking and fencing installer
Frequently asked questions
Do I need planning permission for decking?
Decking up to 30cm (300mm) above ground level is generally permitted development for a dwelling house. Raised decking higher than 30cm, or decking that covers more than 50% of the garden area, requires planning permission. Always check with your local authority in conservation areas or for listed buildings, where different rules apply.
How long does composite decking last compared to timber?
Composite decking (wood fibre and plastic composite) typically lasts 25-30 years with very little maintenance - no annual treatment or staining required. Softwood timber decking lasts approximately 10-15 years with annual treatment and periodic board replacement. Hardwood timber (such as ipe or cumaru) lasts 15-25 years with regular oiling. The premium cost of composite is often recovered in saved maintenance time and cost.
What foundations does decking need?
Decking must be supported on a grid of posts set in concrete at a minimum of 600mm depth (deeper for raised decking), or on adjustable decking feet on a sound concrete base for ground-level installations. The structural design of joists and bearers depends on the height, span and expected load. Any raised decking above 600mm should have a structural design checked by a competent person.